Kinsler_Handbook_#32 December 2017

Kinsler Fuel Injection, Inc, 1834 THUNDERBIRD TROY, MICHIGAN 48084 U.S.A. Phone (248) 362-1145 Fax (248) 362-1032 101 PUMP OUTPUT In theory, a mechanical pump’s output is linear to the RPM at which it is driven. Rotate the pump shaft twice as fast and the flow will double. However, even a good pump is affected by the physical clearances of the gears and the pressure load against the outlet. Typically the flows at very low RPM and very high RPM will be below the linear graph of the pump’s output due to internal leakage, pumping friction losses, and clearance in the components. Running clearance is a must for the pump gears. This clearance causes some internal leakage back past the gears and has the same effect as a bypass from the pump outlet back to the inlet. MECHANICAL FUEL PUMPS TYPICAL APPLICATIONS VERSUS PUMP SIZE These recommendations are based on the pump running at 1/2 crank speed. Variations will occur with RPM of engine and pump drive speed. GENERAL SIZING AND SERVICE Engine displacement, volumetric efficiency, and the fuel being used will dictate the required pump displacement size. If you have a doubt about the size of your pump, note the number stamped on it and give us a call. Several pumps are assembled using the same size hous- ing, so the casting number located on the housing does not indicate the exact pump displacement. Most pumps are identified by the serial number stamped on it. Most pumps experience wear over a period of time. To maintain engine performance on a fuel system where the pump is losing flow out- put, the main jet has to be continually richened. If the main jet is not richened, the top end performance will drop off. If a problem is not found after thoroughly checking other engine components (especially valve springs, cam lobes, and ignition), the pump should be sent in for testing. We can test and rebuild many types of pumps. To have a pump tested, send it in with all of the fittings still in it. Include a day and evening time telephone number with the area code..... a technician will call if there is a problem. ALL FLOWS , SIZES , AND RECOMMENDATIONS FOR FUEL PUMPS ARE FOR GENERAL REFERENCE. CONSULT A KINSLER TECHNICIAN FOR YOUR SPECIFIC APPLICATION !!! Flows in this chart are in pounds per hour (lbs/hr) of .720 specific gravity test fluid at 60 o F. KW-200 335 305 570 -00 380 295 570 KW-300 505 475 845 -0 685 590 1070 KW-400 670 655 1150 KW-500 835 815 1450 0-1/2 960 865 1515 -1 1190 1095 1950 KW-700 1170 1130 2000 KW-1300 2160 2125 3670 -2 2325 2140 3710 -4 2930 2765 4760 PUMP SIZE PUMP RPM PSI 2000 0 2000 50 3500 50 FLOWS ARE AVERAGE OUTPUT - ACTUAL OUT- PUT MAY VARY SLIGHTLY KW-450 770 760 1330 © 2017 KW Hilborn Typical Use N/A BL-235 Very small displacement engines fueled by gasoline and/or alcohol (typically one to four cylinders) 200 -00 Small displacement four cylinder engine (typically) fueled by gasoline and/or alcohol 300 N/A Large displacement four cylinder engine (typically) fueled by gasoline and/or alcohol 400 -0 Gasoline and alcohol (typically 6-cylinder and under 400 cubic inch V8) 450 N/A Alcohol (over 400 cubic inch V8) 500 -1/2 Gasoline and alcohol (typically unblown under 430 cubic inch V8) 700 -1 Unblown and blown gasoline; unblown alcohol up to 700 cubic inch displacement; small displacement blown alcohol low boost or low % nitro 1300 -2 Small displacement unblown high % nitro ; average blown alcohol LB750 -4 Large displacement unblown high % nitro; large displacement high boost blown alcohol; small displacement low boost blown nitro LB1500 -5 Very large displacement high boost blown alcohol; large displacement high boost high % nitro